Designed for high performance-cutting of an extensive range of material. Outer Diameter(D)Inner Diameter (Hole)Segment(T X H X L)Segment NumberInchMetricInchMetric4"1055/8", 20, 7/8"16, 20, 22.231.8x7.0x356/7/84.3"1105/8", 20, 7/8"16, 20, 22.231.9x7.0x32.394.5"11520, 7/8"20, 22.231.9x7.0x38.385"12520, 7/8"20, 22.231.9x7.0x37.596"15020, 7/8"20, 22.231.9x7.0x33.5127"1807/8", 1", 1-1/5"22.23, 25.4, ...